All I can think of in that is, why would someone want to squeeze a person's nailbed THAT hard to see if it's oily?? Granted, there's little tiny holes in the nail due to structure of the human nail and how it grows but it's not a sponge to be squeezed. I have to seriously wonder about the intelligence of the 'nail tech' who wrote that.
I've heard lots of people blame product failure on oily nail beds when most of the time it's improper prep and application that is at fault.
It's safe to say there's a normal amount of body oil on the nail beds, who knows HOW much is too much......it's only after the person gets older the oil production slows down and the nails get brittle.